Answer
It must not be used after a severe allergic reaction to a penicillin or another beta-lactam. Less severe reactions still require careful clinical assessment.
Sources for this answer
- Renoxitin 1g and 2g Powder for Solution for Injection or Infusion — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.